space (padding) between images in ads section

Hi, Our club has some sponsors. I want to show their logo’s on the site. This must be done in the footer. The padding however is very small. The four logo’s are all at the left site of the page. The website is staging.toerfietsleusden.nl What I should like is more space or padding between the logos. Solution for now is to place a white image between the logo’s. So it seems that all is well. I think there is a better solution than this one for this problem. Is there a kind of solution for it? Kind regards Hans Hagmeijer